Sprinkler-head for fire-extinguishers.



J. J. DALY. SPRINKLER HEAD FOR FIRE BXTINGUISHEBS. APPLICATION FILED my 18, 1912.

1,05 1 ,865. Patented Feb. 4, 1913.

WITNESSES IIVVENTOR W may Allormy ITED STATES PATENT OFFICE.

JOHN J. DALY, OF NEW BRUNSWICK, NEW JERSEY, ASSIGNOR T0 PATRICK J. GUILTY, OF NEWARK, NEW JERSEY; CATHERINE QUIL'IY ADMINISTRATRIX OF SAID PATRICK J. QUI'L'IY, DECEASED.

- SPRINKLER-HEAD FOR FIRE-EXTINGUISHERS Specification of Letters Patent.

Patented Feb. 4., 1913.

, To all whom it may concern Be it known that I, JOHN J. DALY, a citizen of the United States, residing at New Brunswick, in the county of Middlesex and State of New Jersey, have invented a certain new and useful Improvement in Sprinkler-Heads for Fire-Extinguishers, of which the following is a full, clear, and exact description.

Sprinkler heads, for stationary 'fire extinguishing systems, ordinarily comprise a valve seated on the Water discharge nipple by means of some sort of strut made up of separable parts held together by solder which is fusible at a predetermined dangerous temperature, and held in placewhile the solder is unaffected by heat by means of a tension screw or adjusting screw which may or may not be connected with the super posed distributer. Many different forms of such separable struts have been patented, and these have operated with more or less e'tliciency. I have found that a strut which might operate merely by the fusing of the solder connecting its parts, is made more efficient if a sort of kick-off or cast-off device is interposed in the solder-joint to insure the separation or collapse of the strut and the release of the valve, and it is the object of this invention to provide a sprinkler head with a strut having such a kick-off or cast-off medium in addition to the solder joint, and preferably applied in the solder joint so as to become immediately effective upon the fusing of the joint.

In the preferred form of construction, herein used in illustration of my invention, 1 have made the strut with its meeting edges and its solder joint out of line with the points of contact of the ends of the strut with the valve and the tension screw, to spectively, so that the pressure of the water upon the melting of the solder joint may be excited to separate the parts of the strut and thus permit the opening of the valve; and in order to insure such a separation of the strut and the opening of the valve, I have interposed in the solder joint located on the opposite side of said line of contact, a roller member which will'act as a kick-off or cast-off, all as I will proceed now to explain and finally claim.

In the accompanying drawings illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is an elevation showing the parts in position of use. Fig. 2 shows the head in longitudinal section, and the strut in elevation, in closed position.' Fig. 3 is an elevation showing the three parts of the strut detached. Fig. 4 is an elevation showing the strut detached and ready for application. Fig. 5 is an elevation showing a modification of the strut, and Fig. 6 is a similar view showing another modification of the strut.

The sprinkler head may comprise a threaded nipple 1, to be screwed into a service pipe, and this nipple is provided with a valve seat 2, upon which is loosely placed the detachable valve 3, of any approved construction, but preferably with the socket 4- in its top to receive one end of the strut. A pair of arms 5 extends upwardly from the nipple, and these arms are united in a sm-cwthreaded socket (S, into which is screwed the distributor 7, which may be held in place, when it is set or adjusted on the strut, by means of a pin or other device 8. The point of the screw 9 of the distributor also has a socket 10 to receive the upper end of the strut.

The strut comprises similar halves 11,

having contact surfaces 12, and oppositethese contact surfaces the halves are flared as at 13, and each half has a terminal rounded tongue 14% to seat or he stepped in the sockets 4t and 10 respectively of the valve and screw; and these tongues are arranged so that they will be in a line drawn centrally through the screw and valve so that the thrust of the seating screw which holds the strut in place will be in a single direct line. These strut members 11 are, in general terms, frustums of triangles in outline, so'

will serve to separate the strut membersL The space between the adjacent flared edges "of the strut members when they are assembled is filled with a suitable solder fusible at a predetermined temperature, and this 'faces may be flared at a smaller angle, as

solder serves to support the strut members; but such support might not be adequate ,under all circumstances, and hence I intro-- duce into the solder and between the flared edges and in contact with them, a circular roller 15. l/Vhile this circular roller acts a a support during the time the fusible solder retains its integrity, a principal ObjECD of its use is to serve as a kiclcoif or cast-oil? during Lil: that the Solder is fusing t ur-P,

the separation of the strut members under the pressure of the water against the valve;

and being located out of the line of thrust j onthe terminal bearings its eiiiciency in this particular is enhanced. The solder is indicated at 16. Preferably it does not extend onto the contact surfaces 12. Asshown in Fig. 5 the contact surfaces may be a point only in each half of the strut; or in other words, these contact surat 17, than the remainder of the flaring surfaces; and the solder joint may or may not extend into this smaller flared surface.

As shown in Fig. .6, the flared surfaces i may be provided with cavities 18 into which the solder mav enter so as to give it a greater ;hold on the strut members, and avoid any necessity there may be for treating the strut members to receive the solder.

Of course, it is to be understood that the cavities shown in Fig, be applied in any of the various forms of struts herein shown and described.

I am aware that it is not broadly new tointerpose in. a strut for use in sprinkler heads a device that will aid in separating the parts of the strut, and that rollers and balls have been so used, but I am not aware of any construction of strut provided with a kick-off or cast-off member such as herein shown and described.

What I claim is 1. A sprinkler head for fire extinguishers,

having a valve and a distributer arranged opposite one another, an adjusting screw, a

noeneee separable strut interposed between the valve and the adjusting screw and having contact surfs LBS out of the direct line of thrust between the adjusting screw and valve, and also having a flared opening on the side opposite the contact surfaces, and a kick-off or cast-off member interposed in said fl opening and out of said line of thrust and adapted to be held in place in aid opening bv fusible mater al and arranged to aid in the separation of the strut upon the fusing of the joint.

2. A sprinkler head for fire extinguishers, having a valved nipple, a distributer, an adjusting screw arranged opposite the valved nipple, a separable strut composed of like halves interposed between the valve of the valved nipple and the adjusting screw and having contact surfaces arranged to-one side of the line of thrust between the screw and the valve, said halves having flared surfaces on the opposite side of said line of thrust, and a circular roller interposed between said flared portions and adapted to be held in place therein by a fusible material.

3; A sprinkler head for'fire extinguishers, I

having a valved nipple, a distributer, an ad justing screw arranged opposite the valved' nipple, a separable strut composed of like halves interposed between the valve of the valved nipple and the adjusting screw and having contact surfaces arranged to one side of the line of thrust between thescrew and the valve, said halves having flared surfaces on the opposite side of said line of thrust, 

